@@ -23,7 +23,7 @@
 5. assume it can be more restrictive but one can have a extra check where the
 postal code is always 6 digits long as it is always for Banglore location.
 
-
+6. Final assumption is that assertions will always be turned on while using also
 ########################################################################
 approach to the problem
 
@@ -65,8 +65,8 @@ def write_outfile(ranks, outputfile_name="topthree.txt"):
 'No of Parcels Delivered', '\n'))
 for pin_code, no_delivery in ranks:
 count += 1
-opfile.write(template.format(str(count)+".", pin_code, str(count),
- str(no_delivery), '\n'))
+opfile.write(template.format(str(count) + ".",
+pin_code, str(count), str(no_delivery), '\n'))
 except IOError:
 return "IO failed"
 except AssertionError:
@@ -90,12 +90,15 @@ def ranksetter(ranklist, no_delivery, postalcode):
 ranksetter([('456098', 3), ('567789', 2), ('560089', 1)], 5, "234561")
 """
 try:
+#input type assertion checks
 assert(isinstance(ranklist, list))
 assert(isinstance(no_delivery, int))
 assert(isinstance(postalcode, str))
 assert(postalcode.isdigit())
+#allowd length checks
 assert(len(ranklist) == 3)
 assert(len(postalcode) == 6)
+#delivery must be non negative and integral
 assert(no_delivery >= 0)
 check_list = [val[1] for val in ranklist]
 exp_list = check_list[:]
@@ -147,7 +150,7 @@ def matcher_and_extractor(constraint_string, input_sub_string,
 assert(input_sub_string[constraint_length].isdigit())
 # is the postal code what we think is digits only and note always we
 #consider it only 6 digit length
-postal_code = input_sub_string[constraint_length: constraint_length+6]
+postal_code = input_sub_string[constraint_length: constraint_length + 6]
 assert(postal_code.isdigit())
 return postal_code
 except AssertionError:
@@ -187,7 +190,6 @@ def toppostalcodes(input_filename):
 for p_code in postalcodedict:
 ranker = ranksetter(ranker, postalcodedict[p_code], p_code)
 assert(ranker is not None)
-print ranker
 return write_outfile(ranker)
 except AssertionError:
 return